diff --git a/bin/all-jfmt.sh b/bin/all-jfmt.sh
index 9c30e887b..d2b07abc4 100755
--- a/bin/all-jfmt.sh
+++ b/bin/all-jfmt.sh
@@ -84,9 +84,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.1 2024-09-24"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -324,6 +331,9 @@ fi
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/all-run.sh b/bin/all-run.sh
index edba4d5c5..7732b8856 100755
--- a/bin/all-run.sh
+++ b/bin/all-run.sh
@@ -113,9 +113,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.4 2024-08-17"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -439,6 +446,9 @@ fi
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/all-years.sh b/bin/all-years.sh
index c99918f89..0d5019190 100755
--- a/bin/all-years.sh
+++ b/bin/all-years.sh
@@ -112,9 +112,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.1 2024-08-17"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -432,6 +439,9 @@ fi
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/chk-entry.sh b/bin/chk-entry.sh
index 823fc39d6..e2fe9a69b 100755
--- a/bin/chk-entry.sh
+++ b/bin/chk-entry.sh
@@ -94,9 +94,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.1.10 2024-08-05"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -368,6 +375,9 @@ fi
 # parameter debugging
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/combine_author_handle.sh b/bin/combine_author_handle.sh
index d19391e3f..08d494e90 100755
--- a/bin/combine_author_handle.sh
+++ b/bin/combine_author_handle.sh
@@ -116,9 +116,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.0 2024-09-23"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -320,6 +327,9 @@ fi
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/csv2entry.sh b/bin/csv2entry.sh
index de4b0fca5..0983cadf7 100755
--- a/bin/csv2entry.sh
+++ b/bin/csv2entry.sh
@@ -138,12 +138,25 @@ shopt -u dotglob	# disable matching files starting with .
 shopt -u nocaseglob	# disable strict case matching
 shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
-shopt -s lastpipe	# explicitly run the last command of the pipe line in the current shell
+
+
+# other required bash options
+#
+# Requires bash with a version 4.2 or later
+#
+shopt -s lastpipe	# run last command of a pipeline not executed in the background in the current shell environment
+
+
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
 
 
 # set variables referenced in the usage message
 #
-export VERSION="1.5 2024-10-08"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -536,6 +549,9 @@ fi
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/cvt-submission.sh b/bin/cvt-submission.sh
index 7a4587d01..c87e4b163 100755
--- a/bin/cvt-submission.sh
+++ b/bin/cvt-submission.sh
@@ -104,9 +104,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.3.3 2025-02-26"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -163,7 +170,7 @@ if [[ -z "$CHKENTRY_TOOL" ]]; then
     exit 5
 fi
 export MIN_CHKENTRY_VERSION="1.1.5"
-CHKENTRY_VERSION=$("$CHKENTRY" -V | head -1 | awk '{print $3;}')
+CHKENTRY_VERSION=$("$CHKENTRY_TOOL" -V | head -1 | awk '{print $3;}')
 if ! "$VERGE" "$CHKENTRY_VERSION" "$MIN_CHKENTRY_VERSION"; then
     echo "$0: FATAL: chkentry version: $CHKENTRY_VERSION < minimum version: $MIN_CHKENTRY_VERSION" 1>&2
     echo "$0: notice: consider updating chkentry from mkiocccentry repo" 1>&2
@@ -1062,6 +1069,9 @@ export TARBALL="$TARBALL_DIR/$ENTRY_ID.mods.$NOW.tar.bz2"
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/entry2csv.sh b/bin/entry2csv.sh
index 55129c067..9fd3ab459 100755
--- a/bin/entry2csv.sh
+++ b/bin/entry2csv.sh
@@ -113,12 +113,25 @@ shopt -u dotglob	# disable matching files starting with .
 shopt -u nocaseglob	# disable strict case matching
 shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
-shopt -s lastpipe	# explicitly run the last command of the pipe line in the current shell
+
+
+# other required bash options
+#
+# Requires bash with a version 4.2 or later
+#
+shopt -s lastpipe	# run last command of a pipeline not executed in the background in the current shell environment
+
+
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
 
 
 # set variables referenced in the usage message
 #
-export VERSION="1.6.1 2024-11-16"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -654,6 +667,9 @@ fi
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/find-invalid-json.sh b/bin/find-invalid-json.sh
index 4cbea9841..a7dd02095 100755
--- a/bin/find-invalid-json.sh
+++ b/bin/find-invalid-json.sh
@@ -17,6 +17,14 @@
 # "Share and Enjoy!"
 #     --  Sirius Cybernetics Corporation Complaints Division, JSON spec department. :-)
 
+
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 VERGE=$(type -P verge)
 export VERGE
 if [[ -z $VERGE ]]; then
@@ -50,7 +58,7 @@ fi
 
 # set variables referenced in the usage message
 #
-export VERSION="1.0.0 2024-10-14"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -147,6 +155,9 @@ fi
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/find-missing-links.sh b/bin/find-missing-links.sh
index d5c351007..de0cf3910 100755
--- a/bin/find-missing-links.sh
+++ b/bin/find-missing-links.sh
@@ -102,9 +102,17 @@ shopt -u nocaseglob	# disable strict case matching
 shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
+
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.1.1 2024-04-28"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -265,6 +273,9 @@ fi
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/format-headers.sh b/bin/format-headers.sh
index 69a7e5653..f570e6ee5 100755
--- a/bin/format-headers.sh
+++ b/bin/format-headers.sh
@@ -24,6 +24,13 @@
 # Share and enjoy! :-)
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # modify well known markdown headers that are not in canonical form
 #
 for i in $(git ls-files '[0-9][0-9][0-9][0-9]/*README.md'); do
diff --git a/bin/gen-authors.sh b/bin/gen-authors.sh
index eb1df4def..a5db96ef0 100755
--- a/bin/gen-authors.sh
+++ b/bin/gen-authors.sh
@@ -96,9 +96,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.14.2 2024-11-16"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -550,6 +557,9 @@ fi
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/gen-location.sh b/bin/gen-location.sh
index 73125b339..376475999 100755
--- a/bin/gen-location.sh
+++ b/bin/gen-location.sh
@@ -83,9 +83,17 @@ shopt -u nocaseglob	# disable strict case matching
 shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
+
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.8.2 2024-11-16"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -435,6 +443,9 @@ export LOCATION_HTML="location.html"
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/gen-other-html.sh b/bin/gen-other-html.sh
index ca7769599..3696d6311 100755
--- a/bin/gen-other-html.sh
+++ b/bin/gen-other-html.sh
@@ -84,9 +84,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.5 2024-08-27"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -356,6 +363,9 @@ TOOL_OPTION+=("$SITE_URL")
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/gen-sitemap.sh b/bin/gen-sitemap.sh
index 9428f43a8..0be799e47 100755
--- a/bin/gen-sitemap.sh
+++ b/bin/gen-sitemap.sh
@@ -96,9 +96,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.3.16 2025-01-09"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -501,6 +508,9 @@ fi
 # parameter debugging
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/gen-status.sh b/bin/gen-status.sh
index 23cf0d749..a32fcbe14 100755
--- a/bin/gen-status.sh
+++ b/bin/gen-status.sh
@@ -84,9 +84,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.8 2024-11-23"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -784,6 +791,9 @@ fi
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/gen-top-html.sh b/bin/gen-top-html.sh
index c849b7edc..066b4e6fd 100755
--- a/bin/gen-top-html.sh
+++ b/bin/gen-top-html.sh
@@ -104,9 +104,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.4.11 2025-01-09"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -453,6 +460,9 @@ fi
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/gen-year-index.sh b/bin/gen-year-index.sh
index 376568f06..fa233800c 100755
--- a/bin/gen-year-index.sh
+++ b/bin/gen-year-index.sh
@@ -86,9 +86,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.2 2024-08-17"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -415,6 +422,9 @@ TOOL_OPTION+=("$TAGLINE")
 # parameter debugging
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/gen-years.sh b/bin/gen-years.sh
index 788736513..d954b4547 100755
--- a/bin/gen-years.sh
+++ b/bin/gen-years.sh
@@ -86,9 +86,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.6.2 2024-11-16"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -593,6 +600,9 @@ export YEARS_HTML="years.html"
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/jfmt-wrapper.sh b/bin/jfmt-wrapper.sh
index 72647bfbf..c3a60c7ff 100755
--- a/bin/jfmt-wrapper.sh
+++ b/bin/jfmt-wrapper.sh
@@ -108,9 +108,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.3 2024-10-08"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -408,6 +415,9 @@ esac
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/jprint-wrapper.sh b/bin/jprint-wrapper.sh
index d13edc6f7..79f3b91e5 100755
--- a/bin/jprint-wrapper.sh
+++ b/bin/jprint-wrapper.sh
@@ -108,9 +108,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.4 2024-10-08"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -409,6 +416,9 @@ esac
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/jval-wrapper.sh b/bin/jval-wrapper.sh
index 7be319ee9..239f965b1 100755
--- a/bin/jval-wrapper.sh
+++ b/bin/jval-wrapper.sh
@@ -92,9 +92,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.2 2024-10-08"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -414,6 +421,9 @@ esac
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/md2html.sh b/bin/md2html.sh
index b36fdcc16..f396298a7 100755
--- a/bin/md2html.sh
+++ b/bin/md2html.sh
@@ -156,9 +156,16 @@ shopt -s globstar	# enable ** to match all files and zero or more directories an
 shopt -s lastpipe	# run last command of a pipeline not executed in the background in the current shell environment
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.8 2024-11-07"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -699,6 +706,9 @@ function debug_parameters
 
     # print values that could be modified by parse_command_line
     #
+    echo "$0: debug[$DEBUG_LEVEL]: $DBG_PREFIX: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[$DEBUG_LEVEL]: $DBG_PREFIX: LANG=$LANG" 1>&2
+    echo "$0: debug[$DEBUG_LEVEL]: $DBG_PREFIX: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[$DEBUG_LEVEL]: $DBG_PREFIX: VERSION=$VERSION" 1>&2
     echo "$0: debug[$DEBUG_LEVEL]: $DBG_PREFIX: NAME=$NAME" 1>&2
     echo "$0: debug[$DEBUG_LEVEL]: $DBG_PREFIX: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/new-dir.sh b/bin/new-dir.sh
index 8e80e4970..271a7066b 100755
--- a/bin/new-dir.sh
+++ b/bin/new-dir.sh
@@ -87,9 +87,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.3.2 2024-08-17"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -334,6 +341,9 @@ fi
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/new-year.sh b/bin/new-year.sh
index da8010199..fb8974cfc 100755
--- a/bin/new-year.sh
+++ b/bin/new-year.sh
@@ -86,9 +86,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.3.2 2024-07-28"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -384,6 +391,9 @@ fi
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/othermd2html.sh b/bin/othermd2html.sh
index b910d7dbf..607580dd9 100755
--- a/bin/othermd2html.sh
+++ b/bin/othermd2html.sh
@@ -87,9 +87,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.0 2024-08-27"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -503,6 +510,9 @@ export UP_TEXT="UP_TEXT=jump to $YYYY_DIR/index.html"
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/output-index-author.sh b/bin/output-index-author.sh
index 8e9a4696b..7c8f6c1c0 100755
--- a/bin/output-index-author.sh
+++ b/bin/output-index-author.sh
@@ -102,9 +102,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.10.2 2024-11-16"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -685,6 +692,9 @@ fi
 # parameter debugging
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/output-index-inventory.sh b/bin/output-index-inventory.sh
index cb3888655..d73f0f639 100755
--- a/bin/output-index-inventory.sh
+++ b/bin/output-index-inventory.sh
@@ -106,17 +106,24 @@ fi
 # We must declare arrays with -ag or -Ag, and we need loops to "export" modified variables.
 # This requires a bash with a version 4.2 or later.  See the larger comment above about bash versions.
 #
-shopt -s nullglob	# enable expand to nothing rather than remaining unexpanded
+shopt -s nullglob	# enable expanded to nothing rather than remaining unexpanded
 shopt -u failglob	# disable error message if no matches are found
-shopt -u dotglob	# disable matching files starting with '.'
+shopt -u dotglob	# disable matching files starting with .
 shopt -u nocaseglob	# disable strict case matching
 shopt -u extglob	# enable extended globbing patterns
-shopt -s globstar	# enable '**' to match all files and zero or more directories and subdirectories
+shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
+
+
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
 
 
 # set variables referenced in the usage message
 #
-export VERSION="1.4.4 2024-11-04"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -462,6 +469,9 @@ fi
 # parameter debugging
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/output-year-index.sh b/bin/output-year-index.sh
index 6862193a7..6fecc0149 100755
--- a/bin/output-year-index.sh
+++ b/bin/output-year-index.sh
@@ -121,9 +121,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.6.2 2024-11-16"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -580,6 +587,9 @@ fi
 # parameter debugging
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/pandoc-wrapper.sh b/bin/pandoc-wrapper.sh
index adf2d8c77..3716fcdab 100755
--- a/bin/pandoc-wrapper.sh
+++ b/bin/pandoc-wrapper.sh
@@ -100,9 +100,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.7.2 2024-08-05"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -283,6 +290,8 @@ export PANDOC_TOOL_VERSION
 # It may be possible that versions > 2.14.0.3 and < 3.1.12.2 might work.
 # We tested pandoc version 3.1.12.2 and therefore set this as the minimum allowed.
 #
+# As of 2025-03-13, pandoc version is 3.6.3, so versions > 3.1.12.2 and < 3.6.3 might work too.
+#
 export PANDOC_MIN_VERSION="3.1.12.2"
 
 
@@ -354,6 +363,9 @@ export INC_DIR="inc"
 # parameter debugging
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/quick-readme2index.sh b/bin/quick-readme2index.sh
index 5af582ddb..1d2d0e152 100755
--- a/bin/quick-readme2index.sh
+++ b/bin/quick-readme2index.sh
@@ -93,9 +93,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.2 2024-08-17"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -520,6 +527,9 @@ TOOL_OPTION+=("$SITE_URL/$YYYY_DIR/index.html")
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/readme2index.sh b/bin/readme2index.sh
index 608d1408c..fbbc20ad4 100755
--- a/bin/readme2index.sh
+++ b/bin/readme2index.sh
@@ -87,9 +87,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.3 2024-08-17"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -480,6 +487,9 @@ TOOL_OPTION+=("$SITE_URL/$YYYY_DIR/index.html")
 # If -v 3 or higher, print exported variables in order that they were exported.
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/sgi.sh b/bin/sgi.sh
index 9c4285833..b258207a3 100755
--- a/bin/sgi.sh
+++ b/bin/sgi.sh
@@ -52,9 +52,16 @@
 # Share and enjoy! :-)
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # load stdin into a temporary gitignore file
 #
-export VERSION="1.2 2024-09-05"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export TMP_GITIGNORE=".tmp.$NAME.GITIGNORE.$$.tmp"
diff --git a/bin/sort.gitignore.sh b/bin/sort.gitignore.sh
index dcc075009..c5fb2f081 100755
--- a/bin/sort.gitignore.sh
+++ b/bin/sort.gitignore.sh
@@ -99,9 +99,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.2 2024-09-05"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -380,6 +387,9 @@ fi
 # parameter debugging
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/status2html.sh b/bin/status2html.sh
index dac9101a9..4fb1f1501 100755
--- a/bin/status2html.sh
+++ b/bin/status2html.sh
@@ -112,9 +112,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.4.5 2024-12-31"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -350,6 +357,9 @@ fi
 # parameter debugging
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/subst.default.sh b/bin/subst.default.sh
index 5ea103fab..02e906f69 100755
--- a/bin/subst.default.sh
+++ b/bin/subst.default.sh
@@ -93,9 +93,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.3.2 2024-08-05"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -239,6 +246,9 @@ export VALIDATOR_ENCODED_URL
 # parameter debugging
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/subst.entry-index.sh b/bin/subst.entry-index.sh
index ea4848f98..a152a6248 100755
--- a/bin/subst.entry-index.sh
+++ b/bin/subst.entry-index.sh
@@ -116,9 +116,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.8.1 2024-10-10"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -622,6 +629,9 @@ fi
 # parameter debugging
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/subst.year-index.sh b/bin/subst.year-index.sh
index 750d15431..0d9f09bc9 100755
--- a/bin/subst.year-index.sh
+++ b/bin/subst.year-index.sh
@@ -104,9 +104,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.1.5 2024-08-05"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -465,6 +472,9 @@ fi
 # parameter debugging
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/tar-entry.sh b/bin/tar-entry.sh
index 004b7e9d1..c4d68dd11 100755
--- a/bin/tar-entry.sh
+++ b/bin/tar-entry.sh
@@ -84,9 +84,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.3.10 2024-08-05"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -443,6 +450,9 @@ export REBUILD_TARBALL=
 # parameter debugging
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/tar-year.sh b/bin/tar-year.sh
index a84db7bda..88d22ee2f 100755
--- a/bin/tar-year.sh
+++ b/bin/tar-year.sh
@@ -84,9 +84,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 
-export VERSION="1.2.8 2024-08-05"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -391,6 +398,9 @@ export REBUILD_TARBALL=
 # parameter debugging
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/untar-entry.sh b/bin/untar-entry.sh
index 9418ff61a..34d93f363 100755
--- a/bin/untar-entry.sh
+++ b/bin/untar-entry.sh
@@ -84,9 +84,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.0.4 2024-08-05"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -342,6 +349,9 @@ fi
 # parameter debugging
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/bin/untar-year.sh b/bin/untar-year.sh
index ccaf3c114..280b3896a 100755
--- a/bin/untar-year.sh
+++ b/bin/untar-year.sh
@@ -70,6 +70,7 @@ if [[ -z ${BASH_VERSINFO[0]} ||
     exit 4
 fi
 
+
 # setup bash file matching
 #
 # We must declare arrays with -ag or -Ag, and we need loops to "export" modified variables.
@@ -83,9 +84,16 @@ shopt -u extglob	# enable extended globbing patterns
 shopt -s globstar	# enable ** to match all files and zero or more directories and subdirectories
 
 
+# IOCCC requires use of C locale
+#
+export LC_ALL="C"
+export LANG="C"
+export LC_NUMERIC="C"
+
+
 # set variables referenced in the usage message
 #
-export VERSION="1.0.4 2024-08-05"
+export VERSION="2.0.0 2025-03-13"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -328,6 +336,9 @@ fi
 # parameter debugging
 #
 if [[ $V_FLAG -ge 3 ]]; then
+    echo "$0: debug[3]: LC_ALL=$LC_ALL" 1>&2
+    echo "$0: debug[3]: LANG=$LANG" 1>&2
+    echo "$0: debug[3]: LC_NUMERIC=$LC_NUMERIC" 1>&2
     echo "$0: debug[3]: VERSION=$VERSION" 1>&2
     echo "$0: debug[3]: NAME=$NAME" 1>&2
     echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
diff --git a/sitemap.xml b/sitemap.xml
index 4374d27bb..263783ad2 100644
--- a/sitemap.xml
+++ b/sitemap.xml
@@ -15186,35 +15186,35 @@
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/all-jfmt.sh</loc>
-    <lastmod>2025-02-15T01:57:55+00:00</lastmod>
+    <lastmod>2025-03-13T22:00:35+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/all-run.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:08:28+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/all-years.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:08:31+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/chk-entry.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:08:33+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/combine_author_handle.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:08:36+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/csv2entry.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:08:39+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/cvt-submission.sh</loc>
-    <lastmod>2025-02-27T19:56:03+00:00</lastmod>
+    <lastmod>2025-03-13T22:08:43+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/entry2csv.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:08:45+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/filelist.entry.json.awk</loc>
@@ -15222,47 +15222,47 @@
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/find-invalid-json.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:08:49+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/find-missing-links.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:08:52+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/format-headers.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T21:47:56+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/gen-authors.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:08:57+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/gen-location.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:09:00+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/gen-other-html.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:09:02+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/gen-sitemap.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:09:05+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/gen-status.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:09:07+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/gen-top-html.sh</loc>
-    <lastmod>2025-03-04T18:04:48+00:00</lastmod>
+    <lastmod>2025-03-13T22:09:10+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/gen-year-index.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:09:12+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/gen-years.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:09:17+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/html.sed</loc>
@@ -15274,15 +15274,15 @@
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/jfmt-wrapper.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:09:20+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/jprint-wrapper.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:09:22+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/jval-wrapper.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:09:24+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/manifest.csv.entry.awk</loc>
@@ -15298,43 +15298,43 @@
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/md2html.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:09:57+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/new-dir.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:06+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/new-year.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:09+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/othermd2html.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:12+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/output-index-author.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:15+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/output-index-inventory.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:18+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/output-year-index.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:20+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/pandoc-wrapper.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:25+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/quick-readme2index.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:29+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/readme2index.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:31+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/README.md</loc>
@@ -15342,23 +15342,23 @@
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/sgi.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:02:07+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/sort.gitignore.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:37+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/status2html.sh</loc>
-    <lastmod>2025-01-10T06:38:21+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:39+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/subst.default.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:42+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/subst.entry-index.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:44+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/subst.entry-navbar.awk</loc>
@@ -15366,7 +15366,7 @@
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/subst.year-index.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:47+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/subst.year-navbar.awk</loc>
@@ -15374,19 +15374,19 @@
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/tar-entry.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:49+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/tar-year.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:51+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/untar-entry.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:10:57+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bin/untar-year.sh</loc>
-    <lastmod>2025-01-10T06:06:40+00:00</lastmod>
+    <lastmod>2025-03-13T22:11:01+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/bugs.html</loc>